1 Coating of the bus bar:
RILSAN® OR KEPSTAN®, RELIABLE SOLUTIONS
To coat copper connectors (bus bars) that connect the cells together, the Rilsan® polyamide 11 in fine powder offers thermal stability, fire resistance and electrical insulation, tried and tested by an increasing number of manufacturers. As fire‑resistance standards become increasingly stringent in some countries, Kepstan® PEKK can withstand 500°C for over 5 minutes and now offers an alternative for this application.
2 Cooling:
STAYING ONE STEP AHEAD
Rilsan® Polyamide 11 is a proven solution for protecting cooling circuits and already accounts for a substantial volume of sales, with strong growth potential for 2030. In the medium term, however, immersion cooling (where the entire battery is filled with a heat‑absorbing liquid) could be required by some manufacturers - a technological change anticipated by Arkema’s R&D which is preparing specific formulations using dielectric fluids.
3 Glues and adhesives:
ADVANCED SOLUTIONS FROM BOSTIK AND SARTOMER
Within a battery, many adhesive functions are used to ensure that there is lasting adhesion between the cells and with the battery pack under demanding conditions. Bostik has made this sector a strong focus of its innovation policy and is developing advanced structural bonding and sealing solutions (gap fillers), which are in the process of being qualified in various gigafactories.
Arkema also offers specialty methacrylate resins under the Sartomer® brand, which provide structural adhesives with exceptional strength and flexibility. These future technologies, specially adapted to the structural bonding requirements of batteries, allow for robust, long‑lasting attachment capable of absorbing vibration and thermal expansion.
4 Insulating coatings for batteries:
UV RESINS ON THE WAY
With the emergence of electric mobility, new levels of performance are required for battery‑related coatings. UV‑curable solutions are attracting the interest of manufacturers due to their instant drying time and ease of application, key factors for industrial efficiency. With its flagship range of Sartomer® UV resins and additives, Arkema is developing high‑performance solutions for this application (electrical insulation, chemical resistance and impact resistance), while avoiding emissions of volatile organic compounds.
